Which of the following statements about the effeyckbm-n-j1 b-o;pooy )e1;69j wbh krct of surface area and volume on the cell’s pboy e9h;1-mpcoj-6-wo; kk b)rn 1jybrocesses is false?

  Which statement best desc5v5tjine y/vpqbt4. * ribes stem cells?

  Which is a correct description of the cell type adapted for gas exchange in th (eg0l- huwo2me lungs?g2e0 uohm(-w l

  Which of the following explains the limitationsm+s:q5( bxk) rli)b-1g hbd lz on cell size?

  What is this cell's mwcd d,t+4mpgi m3)7cci(sm7hjm 6 zp: ost likely primary function, and where could it be located in a mammal?mcjdm4: mc ds),z(p c76 3 phitw7+igm

  Which of the following cha vd;+nlj *traqxi:c 74racteristics of type I pneumocytes contribute to increavxai7d*q r+:l4ctj;nsing the rate of gas exchange?
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone marrow transplant from a 36 year old. One of the mj76o5 oyqwo1u ng0o(functionsgnmu7q o0o ( 56wjo1oy of these cells is to produce red and white blood cells. What type of stem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells fsmqwfta :-u f/6-s*i7a nf:/ zf5znnand striated muscle n-szfn ifs *w6f5qn-a/ z:a/fufmt:7 fibres?

Below is a diagram of a motor neuron. Neurons are the longest w x e,5jcvrdcl0jori*98:r3 y cells in the human bod,d ir8wo:j3vccrxre0*j9 5lyy.
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer fromsigm a0 1-h*fmk) og:d infant respiratory distress syndrome, which could be caused by a lack off-: ) kmdmgai*gh1s0 o sufficient surfactant in the pulmonary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that embryonic spxc 6b* vywt2d (kg05ytem cells are not used in the treatment of leukwxyc*b25vyt d06p gk(aemia?

  The table shows the diameters of red blood cells from different organisms.u 5pgzxsj3g4r qq61- t,c5zfspb- 2rt Which red blood cell wij3r-qcz z4-tupr 1gq t52,6gbs sxf5pll have the highest surface area to volume ratio?

1.Explain how the shape of erythrocytes and cells l ycl)cujz p+c(054oiwining the proximal convoluted tubule make these cells more adapted to th4ioy)z 0c5 jc+( wpucle functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonic st2d +u+rvs; yybem cells and specialised cells is/are not true+ 2+vyrduy;s b?

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the following is, b1 2f8mt0ljn dfyyc: the correct order from smallest to largest?2tc: fdm18bl0j yf,ny

  Which row in the following table gives the correct disadvantages of the dife.mzbj40 m (t w-gu;nsferent stem cell sources for therapeutic ugt0; ( wnbsj. -mmue4zses?

1.Describe how the use of stem cells may be used to treat type I diabetes in zm*z, pf-pg elg1s-y*x g;s,pthe ezf g *;1xzg- ,p*sgp,slym- pfuture.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised cells ( k7gob:(hbh5 lnot to scale).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.